Some relevant copypasta from another forum:
Quote:
Originally Posted by solderdude on Rock Grotto
In the dark we have to rely on our hearing during the day on our eyesight.
At the culmination of the dark the ears work best (around midnight).
Our internal clock works pretty well.
-snip-
Added bonus of late night listening... your ears are much more sensitive so you can turn down the volume a notch or few.
Human hearing has a dynamic range of about 60dB (I made a special test gear to check this) during the day this range shifts upwards (why you can't hear a clock ticking during the day but can at night) you can even shift it up much more by going to a disco or (loud) rock concert. When you step out it takes a good hour to hear the street noises again... the AGC in your brain adjusts slowly.
I've long held (well, as long as I've been listening to hifi, so maybe ten months) that late-night dark listening is the very best tweak out there. Any passive components - cables, vibration absorbers, what have you - none can create in you that mellow feeling of late at night when everything just sounds fantastic. I can't count the number of times that my headphones have been the cause of a late night.